I am planning to buy your PH sensor (
http://wiki.seeedstudio.com/Grove-PH_Sensor/) and run with 3.3v. According
to the wiki, it requires 5V but according to schematic, it is using LDO 5v
to 3.3v so I am not sure if I can use with 3.3v or not. Can you help to
confirm so that I can proceed buying it? Thanks.